(PHP 5 >= 5.1.0)
array_diff_ukey — Computes the difference of arrays using a callback function on the keys for comparison
$array1
, array $array2
[, array $ ...
], callable $key_compare_func
)
Compares the keys from array1 against the keys
from array2 and returns the difference.
This function is like array_diff() except the
comparison is done on the keys instead of the values.
Unlike array_diff_key() a user supplied callback function is used for the indices comparison, not internal function.
array1
The array to compare from
array2
An array to compare against
...
More arrays to compare against
key_compare_func
Funcția de comparare trebuie să întoarcă un întreg mai mic, egal cu sau mai mare decât zero dacă primul argument este considerat respectiv mai mic, egal cu sau mai mare decât al doilea argument.
Returns an array containing all the entries from
array1 that are not present in any of the other arrays.
Example #1 array_diff_ukey() example
<?php
function key_compare_func($key1, $key2)
{
if ($key1 == $key2)
return 0;
else if ($key1 > $key2)
return 1;
else
return -1;
}
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
var_dump(array_diff_ukey($array1, $array2, 'key_compare_func'));
?>
Exemplul de mai sus va afișa:
array(2) {
["red"]=>
int(2)
["purple"]=>
int(4)
}
Notă:
This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff_ukey($array1[0], $array2[0], 'callback_func');.